import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/users/User.vue'
import Rights from '../components/power/Rights'
import Roles from '../components/power/Roles'
Vue.use(VueRouter)

const routes = [{
    path: '/',
    redirect: '/login'
  },
  {
    path: '/login',
    component: Login
  },
  {
    path: '/home',
    component: Home,
    redirect : '/welcome',
    children : [
      {
        path : '/welcome',
        component : Welcome
      },
      {
        path : '/users',
        component : Users
      },
      {
        path : '/rights',
        component : Rights
      },
      {
        path : '/roles',
        component : Roles
      }
    ]
  }
]

const router = new VueRouter({
  routes
})
// 挂载路由导航守卫
router.beforeEach((to, from, next)=>{
  // to 将要访问的路径
  // from 代表从哪个函数跳转过来
  // next 一个函数 表示放行
  //   next() 放行 next('/login') 强制调转

  if(to.path == '/login') return next();
  const tokenStr = window.sessionStorage.getItem('token');
  if(!tokenStr) return next('/login');
  next();
})

export default router